Answer:
$34,000
Step-by-step explanation:
The total variable factory overhead cost = Total cost - the fixed cost
= $30,000 - $10,000
= $20,000
The variable overhead cost of 12,000 units
= $20,000 × 12,000/10,000
=$24,000
Total factory overhead = $10,000 + $24,000 = $34,000